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CIFS AO Troubleshooting

You can verify the general AO configuration and status with the show accelerator and show license commands, as shown in Figure 1. The Enterprise license is required for CIFS accelerator operation.

Figure 1. Verifying Accelerator Status

Next, verify the status that is specific to the CIFS AO by using the show accelerator cifs command, as shown in Figure 2. You want to see that the CIFS AO is Enabled, Running, and Registered, and that the connection limit is displayed. If the Config State is Enabled but the Operational State is Shutdown, it indicates a licensing problem.

Figure 2. Verifying CIFS Accelerator Status

Use the show running-config command to verify that the CIFS traffic policy is properly configured. You want to see accelerate cifs for the WAFS application action and you want to see appropriate match conditions listed for the CIFS classifier, as follows:

Use the show statistics connection optimized cifs command to check that the WAAS device is establishing optimized CIFS connections. Verify that "TCDL" appears in the Accel column for a connection. A "C" indicates that the CIFS AO was used.

If you see "TDL" in the Accel column, the connection was optimized by transport optimizations only and was not inspected by the CIFS AO. This situation can happen if the CIFS AO is disabled, the Enterprise license is not configured, or if the maximum connection limit is reached.

If you see a "G" instead of a "C" in the Accel column, then the connection was pushed down from the CIFS AO to the generic AO and was optimized with transport optimizations only. This situation can happen if the connection requires SMB2 or a digital signature and an error message is logged for it.

In version 4.1.3, the syslog has the following error message for digitally signed connections:

If the Retransmissions counter increases, it means that packets are getting lost in the middle, between the two peer WAEs. This situation will result in lower throughput. You should investigate possible causes for packet lose in the network between the two peer WAEs.

You can view the CIFS request statistics by using the show statistics cifs requests command as follows:

Figure 4. Inspecting CIFS Request Statistics

CIFS AO Logging

The following log files are available for troubleshooting CIFS AO issues:

Windows Print Accelerator Troubleshooting

Troubleshooting the Windows print accelerator is similar to troubleshooting the CIFS AO. You can verify the general AO configuration and status with the show accelerator and show license commands, as shown in Figure 1. The CIFS accelerator must be enabled and the Enterprise license is required. Next, verify the status specific to the CIFS AO by using the show accelerator cifs command.

Use the show statistics windows-print requests command and verify that the "Documents spooled" and "Pages spooled" counters are incrementing, as follows: